dorner was honorably discharged from the u.s. navy reserves just last friday after ten years service, including a tour in the persian gulf. was that the trigger for this killing spree? or evidence of careful planning? >> i have more questions than i do have answers at this point. >> reporter: if corner gets his apparent wish, if he is killed, we might never know the whole truth. nick watt, abc news, los angeles. >>> and nick and david will be staying on this story throughout the night. but we move next here to the great blizzard gathering strength and poised to beaear dn millions of american families across the northeast. experts say it could be the worst snowstorm in a century. our extreme weather team is on the storm front and abc's ginger zee is out where the storm is about to move in. ginger? >> reporter: diane, this may look like a mountain of snow, but it's not. this is 100,000 tons of salt that i'm standing on. i've got some right here in my hand. it is one of so many tools that millions of americans will use as we prepare